Road maintenance device



Aug. 13, 1963 H. A. CARTWRIGHT ROAD MAINTENANCE DEVICE I 7 Sheets-Sheet 1 Filed Dec. 11, 1959 INVENTQR Horace J1. Cartw;

4 .l o ATTORNEY Aug. 13, 1963 v H. A. CARTWRIGHT 3,100,425

ROAD MAINTENANCE DEVICE Filed Dec. 11, 1959 7 Sheets-Sheet 3 INVENTOR Hordce H. Carwry/zf M ATTORNEY Aug. 13, 1963 Filed Dec. 11, 1959 H. A. CARTWRIGHT ROAD MAINTENANCE DEVICE 7 Sheets-Sheet 4 MI'IIIIIIIIIIIIIIIA i L VIIIIIIIIIIIIIII INVENTOR Aug. 13, 1963 H. A. CARTWRIGHT ,4

ROAD MAINTENANCE DEVICE Filed Dec. 11, 1959 '7 Sheets-Sheet 5 INVENTOR Horace .H. C'ar'w 'i ht 5/ @ATTORNEY Aug. 13, 1963 H. A. CARTWRIGHT 3,

ROAD MAINTENANCE DEVICE 7 Sheets-Sheet 6 Filed Dec. 11, 1959 INVENTOR 1/5 Horace QH. Cartzw iyht 533 I ATTORNEY Filed Dec. 11, 1959 '7 Sheets-Sheet '7 INVENTOR Horace A. C'arwl 3,100,425 ROAD MAINTENANCE DEVICE Horace A. Cartwright, Lexington, Ky. (41% 5. Rockford, Tulsa 9, Okla.) Filed Dec. 11, W59, Ser. No. 858,913 15 Claims. (CI. 94-44) This invention relates to a road maintenance device, and more particularly to a device for applying bituminous material aggregate surfacing to a roadway.

My invention is concerned with the solution of the problem in surfacing roadways of avoiding inefiiciency in correlating the bituminous material and aggregate of stone, insofar as the quantitative relationship of these ingredients to each other is concerned, and also of eliminating irregularities in uniformity of the layers, particularly in the laps occasioned by discontinuity in'operation, due either to the daily interruption of work or depletion of materials.

In road maintenance operation involving the use of bituminous material which is spread on a road surface and covered with stone aggregate, efliciency demands the use of heavy grades of bituminous material to secure a strong and effective bond and almost instantaneous application of stone at the highest possible temperature of the bituminous material, which bituminous material sets up rapidly on the road surface. Efliciency of operation also requires the application of the stone aggregate in the wet bituminous material and that the stone be applied uniformly and without streaks and in a single layer. A lag in the application of stone after the spray of bituminous material defeats the formation of an efiective bond between the aggregate and bituminous material.

The application of excess stone cannot be effectively corrected by rolling the same in position. Each of the faulty operations becomes a road hazard since driving over a road so covered serves to 'dislodge the improperly bonded stone, with resulting possible damage.

It is also inescapable thatroadsurfacing operations cannot be continuous beyond the supply of material, and the interruption occasioned by working hours. The halting of operations by reason of each of these circumstances, andperhaps others, results in the' problem of,

and the need for unusualcaution in, effecting a uniform joint, upon the resumption of operations, to secure a uniform and continuous surface. I a

Accordingly, it is an object of my invention to provide a road surfacing and maintenance device fwhich maintains an automatic relationship between spraying of- Still more particularly it is an'object of my inv ention automatically and .efliciency to distribute bituminous material and stone aggregate thereon intim ed relationship and at a rate of distribution which als'surea uniform and effective surface.

f Still more particularlyfit is an object' of invention,

to provide a road maintenance device which will quickly;

efiicientlyiand uniformlyplace fbitumino'us material" and stone aggregate in ajsingle layer upon a roadway after" j interruption of operation,.wh i'ch will: assure a eomntu usf 'fsurface andeliminate any disturbing overlap or irregu -.'lar i'ty at 'thepoint of resumption of ope'r'ationsj g V stillimore particularly, it is anobje'ct of-my' invention 7 to provide a' device which-will assure-'highly'efiicient, and continuous road maintenance operations.

To attain these objects. and such further objects asmay appear herein'or be hereinafter pointed out, I make refer nansmisfs iori anintermedrate strainerST -(n ts11bwn) eirig'v optifinally:v provided. sprayer assembly 21:15 [a looped y section of conduit assembly, the front section 280i which has a;

- ains P atented Aug. 13,, 1963 ice .1; a, ence to the accompanying drawings forming a part hereof, in which- FIGURE '11 is a diagrammatic side elevation showing the relation of my road maintenance device in use with a stone aggregate supply truck; v

FIGURE 2 is a'front elevation of the aggregate and bituminous spraying device in applicating position in accordance with my invention;' J v FIGURE3 isa "side elevation from the ri'ght side of the same device; w i i FIGURE 4 is a fragmentary section taken on the line 4 4 of FIGURE 2; 1 I I I FIGURE '5 is a fragmentary section taken on the line 5'5-'of FIGURE 2; i"

. FIGURE 6 is a fira'gmentary plan taken on the line 6-6 of FIGURE 5; 1 FIGURE 7 is a fragmentary front elevation to illusmate the beginning of theshut off position to stop the surfacing'act-ion on depletion of the supply, and to throw the metering-wheel into road engagement; I FIGURE 8 is atfnagmentary front elevation to illustrate the past cut off position and beginning ofrearward metering, parts indo'tte'd'l ines showing the forward posi tion at about the lap point ready to trip the starting mechanism; V

FIGURE 9 is a plan view corresponding to FIG-, URE 7; 1

FIGURE 10 is a diagrammatic plan view toushow the positions at lap'point or past lap point and pre-lap point of the metering wheel; j-

EIGURES '11, 12am '13 are diagrammatic views of the asphalt flow control line.

I now make reference to the accompanying drawings wherein my invention contemplates the provision of a road surfacing device A which may be hauled in its road surfacing operations by a truck B, having in mind that the ratio volumetrically of stone aggregate or chips "to bitumineus bi-nder is relatively high, to assureu rupted operation, for-example of the'value of twenty tons of lar'ge c'apacity to haul forwardly along thefr'oad the surfacing assemblyA, which ineludes generally, an auX-, iliary bituminous tank supply '10 and an aggregate, dis

tr ibu tor'll, mounted upon a three wheel chassis 12 which is provided with a tongue ,13 for connection with the truck B, as will be readily understood.

The chassis 12 has two rear, downwardly depending brackets- 14 for the left rear and right rear wheels 15,

and a frontpivotalbracket 16 for the 'sing l-e'fr'ont w eel, 17 to which the hauling tongue is connected, esywur e readily understood.

- Rarwardly at the chassis 12', ab ituinineus ltanlcfl is.

supported on thei'footing lg, with provision forniaim tenance er by-a burner-20 neaanny orv mech n sm, a length-of channel rams ,sounce' of. I cing gear- '23, drives '"a pump .24 whose 'oiitlet 2 51. is

a =shelf 21fwhicti supports engine ZZjas pow-er- (FIGURE which, through a red connected-t e branch 26' of the lsphayerfassemblyl 27,

spraying nozzle section 29 which may the of thelconter- uminousrnaterial at proper temperatures} I r ,ji e d ever the. bottom wall quite, tank-adjacent which is provided the sump S for. ;out-.

i tOthesumpS ofthetanklS.

Q aforementioned, i t

It Will be-understood that pressure in the air chamberl ,7 7 grater spreader "58 has] paddle;"ar1'ns' v 5? ext i dth' of the; chamber 54'. 'Ilherpaddle armsSQ .e'xr' stood that otherspray bars may be used, as such feature is not part of my present invention. 7 g

To one side of the strainer ST the conduit assembly 27 includes a three way vent valve 30. To the other side of the :strainer ST there is provided a three way cock 31, with anoutletr32 leading to the line'33 which extends tojthefitop .of the tank1-8'. Another 'outlef34 leads to the spraying assembly, but alongxits length'm-ay be connected to the line 35, which maylconnect with the three way cock-36 on'th suction'side ofthe pump,with provision; optionally,- toconnect the suction side of the pump ;The cock 31 has an actuating lever 3 7, to" which there i is provided a link38 under actuating control ofrthe air chamber ;39 throughjthelinkage of hell c'ranks'and link 7 rods 40,,one arm 41 whereof is connected to the link rod 38, ,and the other'arm 46 of Whichbell crank'linkage i's'connected to the rod 42 for actuating :thespray nozzles in;iaccordancer with a form ;exemplified my patents spring within the air chamber for simultaneous actuation V of the cock lever 37 and to open the nozzle assembly 29. Actuation of the valves 30, 31 and 36 through the air chamber 39 may, therefore, optionally by automatic link age'or by manual operation, serve, to assume a position as' shown in FIGURE 11 wher'einQduring operation of the pump 24: andthe turning of the cook 36 to connect- I the sump of the tank with the pump, the hot asphaltic material will circulate through the vent valve 30, through thet'closed spray har'28, back to the valve 31' which'is connected with the pipe line 33 to return the hot asphaltic material to the tank '18. This condition may be as sumed whenyspraying is discontinued for the purposes of assuring a clear line when operations are resumed. V

" -Another' position which may be assumed is diagranr matically shown in FIGURE 1 2 ;Wherein admission of air, to the hose 43 leading to the air chamber-motor 39 will serve to change the position of the cock 31 so that the ,driy'es theasphaltic material through the cock 31,

iiithddirec'tiofi of the arrows, the spray bar nozzle'asw senj'bly29, 'underthe influence of the link 42 having also I 4 45 7 A: third position which may be assumed by the cocks ea 131-ana-ssis' how in FVI GURB ,13 where, upon turningof the cock 36 to'shutiolf thefiasphaitic material 7 lieenmovedt othe open positio 4 from the tank to the pump, actuation of the pump applies suction to-the line 3 5. The, cock 31 is shifted so that the hlankthereof is opposite to the position for circulating 'asshown in FIGURE 11. The spray bar 28 is closed and the air vent30is open." The'm-ateri-al fromthe spr'ay' .bar is thereby drawn into the pump and thence through 'the line 33 into the tank. The utility of this assembly w labewqr inat id with h actuation sure or c iqfpressurejinthair line 43; as will appea moreclearly as this description proceeds. i

Forwardly; ofthe chassis '12,;an aggregate hopper 47 has itsflniouthqs open-to receive the stone aggregate; V freni the dump truck previously. descrihed,fand which- I haulsjthef distributor assemhly" Alf Transversely, of gthef angulahbottom wan 19 'a screw'typeagitator and spreader V is supported on a shaft soyone end '51 of which isqcxr 5-1 'ternal of the hopper 47;"and} isprovided withzpiniqnsSZ =53" The hopperbottbin A AsP 'a r s mb "5- haf ',.-'5 iu ah, 99 5: i ap u efi ii n e'c s he. h p e (1 ,w h e mw f ber se; ,The euam eristha'safi arter srrhmu hwhichr 5 i p.

-49 leads to; a grayel', 1

mgacross, I

M a snare 'f-trunni oned'inthe s ewalls, with enema 61 extending on the 'same side as the shaft 51' andprovidedwithapinionlfli 75 Y 4 a a On the external wall'of the chamber 47 the stub shaft 63 is provided with a pinion 64. A chain 65 is coupled with the pinion 53and has the flight 66 hearing against the pinion 62 to drive the pinion 62 as the pinions 53 and 64 are driven. V

The pinion 52 is coupled by the drive chain 67 on the metering assembly 68, which also serves as the powerizing means for operation of the gravel spreader previously described, This consists of a tiltable axle 69 whose medial point is trunnioned on the stub shaft 70 extending forwardly from the tongue 71, which is maintained axially rigid but vcrtically pivotal, to support the transversely tiltable aide 69 in accordance with the contour of the road to bepaveds. j 1

fTheaxle 69 has at the right end of themetering assembly" (as viewed in FIGS. 2 and 4) a traction Wheel 72 extending from a stub shaft '73 and supported by the U-shaped bracket 74; A sleeve 75 carries a pinion 76 to couple-thersame tothe "wheel72, to which, in turn, the chain 67 is coupled for driving the pinion 52 keyed to' the shaft 51 for .powerizing the gravel spreader assembly. 7 The opposite or'CenUnalIy positioned end of theaxle 69 is provided with a screw threaded shaft 77 (see FIG- URES 7. and 8) on which the metering wheel 78 is mounted. A screw threaded sleeve 79, to which the wheel is keyed, thereby carries the wheel 78 inwardly and outwardly-along the length of the screw threaded shaft 77, a forward motion of the assembly extending the wheel toward the shoulder 80 bf the shaift 77' and a rearward turning of thewheel 78moving the wheel toward the end 81 0f the shaft 77. The position which the metering wheel, 78 may assume in relation to the roadway is diagrammatically illustrated inFIGURE 10, as will appear as this, description proceeds. i 1 v i J The sleeve 79 adjacent the end facing the shoulder 80 carries a tripping 'disk 82, the inner faceof which jhas a tripping. lug 83 near its periphery, to provide an eccentric member. 1 1 a r a l :No-rm ally, the axle 69 is tilted toraise the traction Wheel '72 the ground under; the influence of the spring 84 (seeFIGURE 2); one} end of which spring is 7 attached to the axle ,69 and the other end of which is attached to an ear 85nd the' air cham be'r motor 86, which is fixedly supported on a lbracket 87 on tongue extending fironi th'ezchassis frame 88. p s

-:,The'airchamber motor 86-has the usual spring biased contracting diaphr agm with aconnecting rod 89 coupled to thei'axle 69 to tilt upon actiiatiorr ofthe axle '69 about the stud shaft 70. Projectionirifiuence of the connecting 50 red 89 is elfected by poweri'zing the airlchamberrnotor' 86 by means of air leading to it through the hose 90. For th s purpose, the auxiliary engine 22 powerizes an .air compressor C which maintains the'ai'r storage tank 91 at dcs1re'd air pressure as asource of air pressure for actuat 'ing bct 'a r chamber motors -39 and 86. v i r The-'airohamber 3 9 is controlled through the line 43 under the control of'the air valve 92, coupling the'lever 93 by the pivot arm 9.4andit1hellink'95 to the pivotal axle which,,mfthe ryaised position of the end ,77 .carryiug themeterin'gwhee'lfls, ropenskthe' valve 92 to powerize the Phg illlimbtcf-iig, -thereby actuatihg. the spraying a Q;

- seinhly previouslydescri'bed. 12", y I V chambermotor tiqand ts hose9Q are supplied IGURES 2, fetidfjii-itheiphsitihn ofthe ports hwy-unsure,

a? i I V under-the influenc'ekdf the lever arm 99. Ya1ver98 is a three way valve 'wi thpn'e hidenderwater;oa hshas t r, a. a, yalvezfigeachliaving independ-i' 1 aqmat ng tl s; .9 1 1100; to rotate theivalve; f ll l5 a I,

wheel 78 into contact with the road and raising the wheel 72 from the ground.

Valve 97 can assume a closed position and valve 98 an open position to retain the metering wheel 78 on the roadway and raise the wheel 72 under the manual influence of handle 102 at an intermediate point on-the bracket 103,:and has its end 104 coupled to the floating lever 105 by means of the link 106. The floating con nection permits of a sequence of operation which is desired by relatively independent operation of the operatinglevers 99 and 190', respectively.

Intermediate the floating lever 105, a draw rod lit-7 is coupled thereto andis'guided adjacent to the lever 19 on a horizontally pivotal guide 1&8.

The draw rod1tl7 has an L-shaped, transversely directed branch 109 on its end, which branch 1G9 serves as a common pivot and coupling for the lever 99 for operating the cock 97, as Well as the pivotal fulcnim for the latch 110, at an intermediate point along its length andthe end lot which is provided with a tripping lug 112 outl'med by the Uashaped looped branch 113, through which the draw rod branch 1G9 passes.

The lever 99 is spanned 'on opposite faces by the latch 11%) and the looped branch 113 tocontrol these members in pivotal connection with each other. When the latch 11% is tilted to unlatched position, it will be drawn outwardly or to the right, as viewed from the front in 6 1 stud 1115.. This arranges the sequence valves 97 and 98 to powerize the air chamber 86 and bring the feed drive wheel 72 into contact with the road when the forward movement to point A (FIGURE 10) trips latch lltl as lug 83 strikes the tripping lug 112. The dump truck B p is then started forward, to draw the distributor at the proper speed in the direction of the parting line.

operation serves: threadedly to. return the road'contacting metering wheel 78 and to move it on, and inwardly, along the shaft 77 until the tripping lug 83 has its pathof movement intersect the lug 112, to trip the same land to tilt and pivot it about the draw rod'br'anch 109, to disengage the tooth 116 at its opposite end from the stud 115, activating the spring 111 to release the latch and pivot thelever 99, tomove the valve 97, resulting in the position shown inFIGURE 2 at the instant the distributor assembly reaches the parting line;

g the valve 92 through the linkage 93, 94 and 95 connected FIGS. 2,7, and 8, by spring 111 which has one end attached to the outer end of the latoh and is anchored at its other end to the axle 69. The lever 99, being coupled to the latch, will also be moved, or be turned, to the position shown in FIG. 7. a The latch 110 has an arcuate bearing edge 114 which assures :tiltable clearance when the latch rides on the stud 115 along a guiding edge 114 which terminates in a pawl tooth 116, the operation of which fro'm'the dotted line position will also presently become apparent.

The floating lever 165 has its end 116a connected by the link 117 to the pivotal lever 1% for controlling the pivotal movement :of the valve 98 as the levers 192 and 185' are moved to various pivotal positions, as more clearly shown from an inspection of FIGURES 2, 7 and 8.

By the foregoing arrangement, the operation for secur into the auxiliary tank It by the supply truck T shown in FIGURE 1, preferably at spraying temperatures, and

this hot material is circulated through thespray bar assenrb ly 29 with the nozzles closed by the hook-up of the valves as shown in FIGURE 11, to bring the temperature of the spray bar and nozzles up to, the temperature or the material, the engine 22 and pump 24 on the unit being so adjusted that a proper amount of the bituminous material is circulating through the spray bar Olf the assembly. The metering wheel '78 of the distributor 11 is brought'to the parting line on the roadbed so that the metering'wheel78 ready to assume a raised position,

such as shown in FIGURE 2. I

The dump buclcB with the gravel or stone isbacked into position and hooked onto the distributor unit .11

through tl ie coupling 13, and the body'raised to fill the hopper47'. Thereupon the dump truck B and thedist'ributor unit 11 are ready for the metering operation, care being exercised that the metering wheel 73" is along the center of the threaded shaft 77, as shown in FIGURE 7,:

and that the spray bar is in the desired position'to star-t operating. 'Ilhe truck and distributor unit are then backed a few feet to reach point C of FIGURE 10. In so doing, the wheel 78 is threadedly rotated on the shafit 77 to move toward the outer end 8-1.

' Thereupon the actuating lever 102 is drawn back from the position" shown in FIGURE 7 to the position shown in FIGURE 8, which projects the latch 110 against the spring pressure 111 and latches the tooth 116 onto the viously described, to provide meansfor distributing the v gravel through the hopper while the spray assembly is operating, in proper proportion to each other. The truck B 'proc'eedsdown the road, feeding aggregate into the hopper 47 of the distributing'unit 11 at a predetermined rate of movement during entire operation. When the body or" the dump truck B has used up its gravel and the hopper 47 on the distributing unit is nearly empty,

the operating handle" 102 is pushed manually, to rotate the valve 98 to the closed position and shut off the air supply from the air chamber motor 36 which holds the arr/m wheel .72 in driving position. This same movement of the lever 102 sequentially vents the air chamber motor 86, allowing the spring 84 to raise the driving wheel oil the roadway, stopping the feed of the gravel or aggregate from the spreader of the hopper. The consequent tilting of the axle 69' results to lower the bar 94 and move'the lever 93 of the bitumen controlvalve 92, thereby shutting ed the air SDPl ly along the line '43 to the vchamber motor ,39'taiid shutting off the spray bar while also positioningth'e meteringwheel 78. in contact with the roadway, to ro-tate'the whe'elforwardly on the threaded shaft on which vit is mounted. forward rotation 7 threads the .wheel'78 inwardly on the axle 69 previously 5 described, whereuponthe forward movement of the dump truck'Bisfstopped. I g

'It is-convenientthen to back the truck B so that the distributor unit 11 is backed onto the finished surface.

This backing procedure r'eversely moves the metering wheel: 78 toward the end at of the shaft '77. At this" stage, the truck B may be unhooked and a loaded truck backed into position and hooked onto the unit .11, in

which-position the operating lever 102 and the floating lever to operate the sequential air valves 97, 98,, are pulled out to reset the valves 97, 98.

Should the bitumen in the auxiliary tank 18 require replenishment, it may conveniently be done at this time.

Also, in view of the forward position of hauling of the distributor assembly 11 relation to the dump I With this occurrence, a tilting movement of the axle 69 occurs, toopen the air valve 97 and powerize the air .cham-b-er 86, to push the wheel 72 and to open. sequentween, ucceedingapplications, 'whicihmayoccu'r by re'ason 1 Having thu truck, great facility is experiencediu the control ofthe distributor assembly by tli'edumptruck- B'. .5 i v At the fimelofeifectingreplenishment of the supplyiof aggregate, .a. condition exists where the distributor unitj A has been backedrearwardly of the end of the previous paving operation and mhe cutting off of theair valves is accompanied bya rearward movement .of .the lever 102;

to set-the latch-.110 into latdhed position. .The backing ofzthe truck B has thereupon moved the metering wheel. 78 from the exact. point of ClltrOfiiitOWfild the. outer end the meteringwheel; 78 :forthe exact number ofsaid turns. it 'will trip therlatclrlll) ;as it reaches the exact .posi-.

tion where the distributing operation haspreviously been cut. olf, to. activate the 'air'ch'amber motor 86 and drop said spraying means, a 'tiltable axle coupled to said last control means,- said tiltable axle having wheeled driver means arranged to be coupled to said second assembly distributing outlet, air chamber motor means for urging said driver wheel into road contacting engagement and valving means for-controlling said air supply to the air ichamber m'otor means, a metering wheel on said axle 10- 81of; the .shaft77, leaving the assemblyin readiness so l that jwhenrthetruck is moved forward again, it turn opposite to said driver wheeltfor contacting said roadway upon raising said driver wheel, saidmetering wheel having a screw-threaded sleeve threadedly mountingthe metering wheel on the axle for axial movement, a lugon said'metera .ing wheel, manual meansfor tiltably positioning said axle to urge said metering wheel into, road;,contacting'position,

the driving wheel 72' and raise the meteringwheel 78,

as previously described. -The feed of aggregateandkbitumen ds, therefore, coordinated with exactness in time and at: the prescribed mate of .movement, to; achieve-correct apportionment... 1 1 l .Desoription notbelrnade of nozzles for proper lap .of the spray on the. road'surface as this control will bereadily understood, and particular ni eference is made .to my patent aforementioned for such expedient.

Duiing non-use of the equipment a; at the endof a working period, manual orautomatic means may beuse tosetithe valves 30, 31 and 36 into position for either circulating in a closed ,circulating system, as;diagram,,

members, with the 'trailing'valve having an 311' exhaust ma ical yt n F GURE 112 2 4 Previo s y d scri ed or, when the'equipment is to remain unused aHdWfilQCOO'l.

1' on. th v l s- 3 -and3 may he Pm t o vacu-- atelhe' pr y .iba assemb rb iq ethe bi men s lid fi .Ec ihi puru e the p p a b i n te t ev cu t e i uminous mat i li m t sp ay ba a re r 1t to thetank ll) closing the valve 30,0onnecting the a QLS -L wi he. in 33,- d li s e valve 3 to have the suction sid'e of thepurnp 24- connected with "the lin' fis. When the lines are cleared, the system may 3 be permitted to 6601. a

It will also be understood'that the sequence operathe exhaust condition at A', whereupon the handle lfllis' moved to the olf-position and thereupon the truck accompanied by the driving wheel 72 jumping from icon-Q tactlwith the road and the metering-wheel 78 is'pressed i into'coritactwith thelroa'd torch to the position B. The

' truck then backs vtheunit A onto the covered section, to' point C, and'lis smocked; The tank unit is recharged.

The joint, A is then swept togive a clean, even edge and the h andle 'is'n'iove'd to 'the' on position. i The truck is drawn forward again, with the metering whee1 78 incontactwith the paved road .as a result of movement byjthehandle 102. The metering wheel 's rolls to the'ioint A" and there trips' the lat chili) At joint A; operationis re- 6' rmum'edas alreadyl descri-bed;

a ,f By the construction described, lrozid. paving and inaihformity' of deposition and elimination of poor joints" be of interruptions. r

Patent is: 1 1, A' road surfacing and aggregate distributing device 7 comprising, in combination, a Wheeled'supp0rtin'gframc adapted to h e-hauled on-a roadway to be surfacecha bitu- .j' men spraying assemblyca-rried by said frame, an aggregate hopper and spreading assembly, each'of which assemblies having distributing outlets, 'air powerized meansfor actuating-said spraying means, 'fiow gcoritrol"means' for I tron rnay include the followingzi' during operation as the j r paving progresses, the truck B draws 'the assembly toward 7 v is sto ped beyond thepointIAZ at'the. point B"; lThis is.

while'disengaging said driver wheel from theroad, and

latch means for engagemeutfb? theisaidlug to restrain, said axle in said meteringwheel tilted-position; said latch means and metering wheel having cooperative engagement predeterminedly to release said latchmeans, and linkage between said latch means and said vralving. means to actuate said air chamber motor to direct said driving wheel into road contact while simultaneously actuatingsaid flow control means for said spraying means.

2. A combined road surfacing and aggregate distributing devicein accordance with claim 1 wherein said valving means comprises in line, sequentially positionedvalve port for releasing the pressure of said'chamber motor and spring biasedmeans for urging said metering wheel in' 7 road contacting engagement upon release of said pressure as r in said air chamber motor.-

3. A roadway surfacing and aggregate distributing apparatus adapted to be hauled by truck, said apparatus 7 comprising, incornbinati-on, a ;wheeled supponting'frame,

a bitumen spraying assembly carried thereon, an aggregate material spreading assembly on the frame adjacent to the spraying asse-mbly, means operatively connected with said spraying assembly for eifecting the distribution 7 of bitumen over an underlying surface, r nea.ns operatively connected with the aggregate assembly for effecting'the distribution of material from the aggregate spreading assembly ontothe sprayed'bitumen, mechanism common to said assembliesyand operatively connected thereto for I controlling the operation-thereof land the distribution of.

material therefrom, and means carried on said wheeled supporting frame for movement relative to and intov and out of operative engagement with an underlying roadway and operatively coupled withlsaid mechanism for alternatively putting thesaid means of: said'assemblies into and out of operation.

4. A roadway surfacing and aggregate distribution apparatus adapted to be hauledby a truck, said apparatus comprising, in'combination, a wheeled supporting frame, a bitumen material spraying assembly carried tenance operations are assured with maximum economy 7 and "efliciency, minimal interruptions ofioperation, 'uni-'" thereby, an aggregate material spreading assembly on the frame adjacent to the spraying assembly and in position to spread aggregate onto and to-cover the sprayed bituminous inateriaL mechahism connected with said spraying assembly for effecting the discharge of'bituminous material from said spraying assembly, mechanism operatively connected. with-said material spreading assembly for actuating the latter to effect discharge of aggregate mate rial therefrom,ia driver wheeLfmeans supporting the driver wheel from the frame for movement into and out 7 described'my invention and illustrated its Y e, what I claim as'new and desire to secure by Letters of engagement with the roadway, meansoperatively coupling said wheel with the aggregate spreading assembly gagement with the roadway, means "for securing said wheel in elevated position-from the roadway, means maintaining the bituminous material discharge effecting mechanism inoperative while said wheel is secured in elevated position, a second, wheel supported for simultaneous movement with and in the opposite direction to the driver wheel for engagement with the roadway when the driver wheel is elevated, means actuated by said second wheel when in contact with the roadway and upon a predetermined rotation thereof for effecting release of the said driver wheel securing means to permit movement of the driver wheel into engagment with the roadway, and means for making operative the bituminous material discharge effecting mechanism upon such release of the secured driver wheel.

5. A road surfacing apparatus adapted to be hauled along a roadway comprising, in combination, a wheeled supporting frame, a bitumen spraying assembly and an aggregate spreading assembly on the frame in adjacent relation to each other, control mechanism operatively connected with and for effecting the distribution of material from the first named assembly, control mechanism operatively connected with and for elfecting the distribution of material from the second named assembly, a tiltable axle suspended from the wheeled supporting frame, wheel members on said axle for alternative contact with the roadway by tilting of said axle, one wheel constituting a driver wheel in operative connection with the aggregate spreading assembly mechanism for distributing said aggregate from the latter, manual means for tilting said axle tomove said other Wheel into roadway engaging position, means for latching said tiltable axle to hold the said other wheel in roadway engaging position, tripping means on said other wheel to release said tiltableaxle upon a predetermined rotation of said other wheel in one direction to permit movement of said driver wheel into road contacting position, and mechanism maintaining the control mechanisms for the assemblies inoperative while the tiltable axle is in latching position and for putting said control mechanisms inoperation upon unlatching of the axle and the engagement of the driver wheel with the roadway.

6. A road surfacing apparatus adapted to be hauled along a roadway comprising, in combination, a wheeled supporting frame, a power operated spraying assembly and an aggregate spreading assembly mounted on said frameadjacent to each' other, mechanism for and operatively connected with each assembly for effecting discharge of materials from the respective assembliesQcontrol means for the material discharge effecting mechanism of said sprayingassembly,control means for the material discharge effecting mechanism of said spreading assembly, a tiltable axle ca'rriedby theframe, the opposite ends of said axle having a first wheel anda second Wheel thereon, a coupling'between said axle and said control mechanism for thefirstnamedassembly, manual means connected with and fortilting saidaxle whereby to urge s'aid second wheel into roadway contacting position, a

driving coupling between said 'control'mechanism for the second .assembly'and-the first wheel, latching means to hold said manual means'in a-predet'ermined position relative to said second wheel and an element carried by the second Wheel in a position to engage said latching means and effect release of said latching means to permit movement of the first wheel into driving roadway engagement after a predetermined extent of rotation in one direction of said-second wheel.

7. A road surfacing apparatus comprising, in combination, a wheeled supporting frame adapted to be hauled along a roadway, a bitumen spraying assembly and an urging tilting of the axle in a direction to move said first aggregate spreading assembly on said frame, said assem j blies having outlets in close adjacency to each other,

mechanism carried by the frame for controlling bitumen discharge from the spraying assembly outlet, a tiltable support means mounted on the frame and operatively coupled to the control mechanism for said spraying assembly, a driver wheel on said tiltable support means,

aggregate moving means forming a part of the aggregate spreading assembly for moving aggregate'through the aggregate outlet, a driving connection between the driver for actuating the 10 wheel and said aggregate moving means, a second wheel on said support means for alternative contact with said roadway when saiddriver Wheel is moved from road contacting position, manual means for tilting said. sup port means, means for latching said support means tilted with said second Wheel in road contacting engagement, means on said second wheel for tripping said latching means on a predetermined extent of rotation of said second wheel, and-power operated means forurging said driver wheel into road engagement upon the tripping of said first wheel being 'operatively coupled to said control means for said aggregate spreader for driving the same, the said second wheelbeing threadedly mounted on the axle for axial movement between an inner and an outer position thereon in accordance with the number of forward and reverse rotations transmitted to the second wheel, means connected with said axle for manually tilt ing the axle for selective engagement of said wheels With the roadway \and'to actuate said control means, mechanism for latching the axle in a tilted position with said second wheel in road engaging contact, cooperating means carried by said second wheel and said latching mechanism for effecting release of said latching mechanism'upon a predetermined forward rotation of said second wheel for permitting lifting of'the' second wheel from roadway engaging contact and for permitting said first Wheel to be lowered into road engaging contact to actuate "said spreader control means, and means operatively coupling I the axle with the frame for tilting'the axle following release of the latching rneaiis to. lift the second wheel and lower the first w h eel.

9. A road surfacing apparatus comprising-in combination, a wheeled supporting frame adapted to be hauled along a roadway to be surfaced, "a bitumen spreader as sembly carried by said frame, an aggregate hopper and spreading assembly carried by the frame,"s'aidas'semblies' having materialidischarging outlets in close adjacency to -on-eanother, power operated means on the frame" and ,operatively" coupledtosaidcontrol means for said;

spraying assembly to alternatively start and stop" "opera tion of said sprayin'g'nie'ans when tilted frorri' dne positic'pn to another, said tiltable axle, carrying a first' wheel having driving connection with said spreader assembly, a second wheel carried bythe tiltable axle, means connected to said axle for manually tilting the axle for selective engagement of said first and second wheels With the underlying roadway, valve controlled fluid power operated mechanism operatively coupled with said'axle for wheel into roadway engaging contact and cooperating control means carried by said second wheel and axle valve of said valve controlled mechamsm. I

10. The invention according to claim 9, wherein the means coupling said second wheel with saidelongate member is a threaded coupling such that the second wheel moves .in one direction axially on the elongate member to triggering position while rotating in one direci the'first valve 'and to move engaging position 11' saidsecond wheel triggered mechanism is carried upon said elongate memberr a, v V

12. A road surfacing apparatus comprising, in combination, a 'wheeled supporting frame adapted to be hauled along a roadway, a bitumen spraying assembly carried by said frame andincludingspray nozzles and a first valve controlling flow of bitumen to the nozzles, an aggregate handling assembly on the frame including a hopper and means for ejecting aggregate therefrom, a first fluidpressure motor :onthe frame, mechanism connected between said motor and said valve for actuating the lat ter, afsecond valvemeans controlling flow ofpressurized operatingfluid'from a pressure source to said motor, an elongate member pivotally suspended intermediate its ends from the :frame for tilting ina substantially vertical plane extending substantially perpendicular to thepath of .travelof -.the,fr 'anie, a first wheel and a se'condwheel,

entirely V one'side of the pivot suspension thereof whereby activasaid wheels'being'qrotatably supported on' opposite ends 3 of said elongate. member. for alternate contact withthe roadway,: ao drivingconnection between the said first wheel. and said aggregate ejecting means, a second fluid pressure operatedmotor operatively connected with said elongate. member at a point thereon to turn the latter to a 'first'tilted position when energized and in which position the first wheel is brought into engagement with the roadway, a third valve meanscontrolling flow of pressurizedfluid from said-source to said second motor,

means normally urging tilting ofsaid elongate member I ma second tilted position to raise the first wheel and lower'the second wheelinto contact withthe roadway when the'second motor is inactivated, releasable means for holding the elongate member in the said second tilted position, andmechanism operatively connected with said second and third valve means and said second motor which is triggeredinto operation by the second wheel upon a predetermined rotation of the latter for effecting actuation of the second and third'valve means whereby said first and second motors function respectively to open I 13. A road surfacing apparatus-comprising, in combination, a wheeled supportingframe adapted to be .hauled; along a 'roadway, a;bitumen spraying assembly carried by said frame and including-,spraynozzles and a first valve controlling flow of bitumen to the nozzles,

the first wheel into roadway 12 elongate member for alternatecontact with the roadway, a driving connection between the said first wheel and said aggregate ejecting means, a second fluid pressure operated motor on the frame, means connecting said second motor to said pivotally supported elongate member on tion'of the. second motor effects turning of the elongate member to a first position to lower the first wheel into contact with the roadway, a third valve means controlling flow of pressurized fluid to the second motorvfrom said source and reversely fromthe second motor to the atmosphere, an operative coupling between said'elongate member on said one side of the pivot and the second valve means to open the latter upon the activation of the second motor, means coupling the elongate. member with a fixedrpart of the apparatus, andsnormally urgingturning of the elongate member to a second position to raisethe tfirst wheel and, lower the second wheel to the roadwayywhen the second motor is inactivated, means movably carried by the elongate member and coupled to the third valve means for moving and holding the latter means against activation :of the second motor while the second wheel is in engagement with the roadway, and means car- Iied by the second wheellwhereby the latter will effect movement of said means movablycarried by'the'elongate member upon a predetermined rotation of the'sec'ond wheel in one direction and movement 'of the third valve means for activation of the second motor.

,14. The invention according to claim 13, wherein the said means movably carried by the elongate member comprises a sliding member supported for-movement toward the second wheel against a retracting force, means for manually moving said sliding member toward the second wheel, means vfor latching the sliding member in a set position when so manually moved where the third valve means is set to maintain the second motor inactive an'raggregate handling assemhly on the frame including. a

a hopper and means for ejecting aggregate therefrom, a. first fluid pressure motor, mechanism connected between saidmotor and said valve for. actuating the latter, a second valvecontrollingflowof pressurized operating fluid from a pressure sourceito saidmotor, an elongate member ,pivotally: suspended intermediate its, ends from the ing susbtantiaJly perpendicular 1051 11 path of travel of the'frame, first wheel; and a second;Wheel saidWheels being rotatably supported on v, opposite ends 'of said llting a; substantially vertical plane extend-i rotation of the second wheel. I a

and said means carried by the, second Wheelcomprising a lugpositioned-to engage and unl atch said sliding member;i="v

' 15. The invention according to claim 13, wherein the second wheel is screw threaded on the elongate member to move in an axial direction and cause the said move ment of said movablemeansafter the said predetermined References Cited in theme of this patent 1 UNITED STATES 1 ATENTS 1,613,051 Napier Ian. 4, 1927 1,750,104 Heltzel ,Mar. 11,1930 2,579,792, Oartwright Dec. 25, 1951 2,669,915 McConnaughay; Feb. 23, 1954 2,833,542 'Martin' H May,6,i1-95,8 2,906,438 Carpenter j Sept. 2911959 Peoples i Feb.'16,-I19 

3. A ROADWAY SURFACING AND AGGREGATE DISTRIBUTING APPARATUS ADAPTED TO BE HAULED BY TRUCK, SAID APPARATUS COMPRISING, IN COMBINATION, A WHEELED SUPPORTING FRAME, A BITUMEN SPRAYING ASSEMBLY CARRIED THEREON, AN AGGREGATE MATERIAL SPREADING ASSEMBLY ON THE FRAME ADJACENT TO THE SPRAYING ASSEMBLY, MEANS OPERATIVELY CONNECTED WITH SAID SPRAYING ASSEMBLY FOR EFFECTING THE DISTRIBUTION OF BITUMEN OVER AN UNDERLYING SURFACE, MEANS OPERATIVELY CONNECTED WITH THE AGGREGATE ASSEMBLY FOR EFFECTING THE DISTRIBUTION OF MATERIAL FROM THE AGGREGATE SPREADING ASSEMBLY ONTO THE SPRAYED BITUMEN, MECHANISM COMMON TO SAID ASSEMBLIES AND OPERATIVELY CONNECTED THERETO FOR CONTROLLING THE OPERATION THEREOF AND THE DISTRIBUTION OF 